![grbl controller for k40 grbl controller for k40](https://i2.wp.com/davidrowntree.co.uk/wp-content/uploads/2021/02/K40_Bed-scaled.jpg)
- #Grbl controller for k40 install#
- #Grbl controller for k40 drivers#
- #Grbl controller for k40 driver#
- #Grbl controller for k40 plus#
- #Grbl controller for k40 series#
So now I need a lathe, any excuse to buy tools right? So I did ! The switches are common ground, then to the controller board, pins 2 and 3, pulse and dir to the controller, 8 and 9. Two phases to the motor, 24Vish to the motor driver, common ground, 5V to the opto and the controller board. The cap is 1uF 0805 it won’t work properly without thisĪnd there we have it, now to mount it in the laser, the tedious part! since it’s a double sided board and I only cut one side, the blue kynar is doing ground, I couldn’t route it single but I might drop one of the io’s and add a ground on the rear pins.
#Grbl controller for k40 plus#
The downside to doing that way, rather than using the microprocessors inputs is that its harder to override if for some reason you need too, but if you’ve got limited IO space, and makes the wiring simpler, plus don’t really have to worry about noise/debounce.
#Grbl controller for k40 series#
Wire the limit in series with the switch, so when its engaged the control button won’t be able to close the circuit, so you can only use the down one. Momentary pushes ( all my black ones were not working correctly, so I used two red) one easy way to wire up the limits is to use a microswitch with NC connections, normally closed vs NO normally open. its about 2.6cm x 2.6cmĪnd a short while later (This is actually a rougher version I recut it) I modded my cylon to look like this, its got extra ports too. The CY8CKIT is about $25, so instead I decided to make it for about $2ĭecided to try to redo one of the old cylon boards to see if I can make a mini controller.
#Grbl controller for k40 install#
I haven’t decided how best to install it yet. so I removed the post, we’ll see what the effect of that is. One of the four posts on the z table gets in the way of the smoke extractor. Now all I have to do is mount the limit switches, and thenfit it into the laserĪnd then remove these posts (and all the gunk) I could use the capsense to do a slider for the speed it moves at, but I think a fast/slow button set is easier. Pulse is wired to PUL on the m415 and Dir to DIR, common ground. The pins I choose make the RGB LED on the board change colour when up/.down is selected I set the PWM to period 32/16 count, that gave me just about 6khz
![grbl controller for k40 grbl controller for k40](https://awesome.tech/wp-content/uploads/asgarosforum/1567/20200302_0946301.jpg)
If either of the switches are pressed, the table goes up and down, the limit switches will stop the current direction, but allow it to go the other way. So then I needed something to drive it, poked through my dev board boxes and found a Cypress CY8CKIT-042 (as well as a stepper motor driver! ). The Electronic Goldmine had a sale on miniswitches, I want to type mini microswitches, but that seems wrong, Stock # 61690B so I picked up a 100 or so they’re right angled pcb thru hole mount lever style, I wanted them for various things like cnc limit switches, so I’ll add them to this and see what happens Though these might be different motors, they are not getting hot.
#Grbl controller for k40 driver#
I used the M415 driver, tried out a few speeds from 1khz to 16khz to see what gave the best results, 6khz seemed fine (16 steps) I also set the current of off/on/off or 1.05A measuring the power draw on my PSU it was about 0.4A which the datasheet for the motors its mean to be claim, the driver manual notes that the current on the coils might be less than you set, and it reduces the current by about 60% when idle. I fed the info back to lightobject, who are a super nice place to deal with, just had to move two wires on the connector from position 1, to 2 and from 6 to 5. I probed the motor wires with an ohm meter and they were open circuit, so I prodded the pins on the motor and found the two coils, the cable was wired incorrectly. So put it together and waited for them to arrive.Īfter hooking up the motors and stepper to my frequency generator, I got nada, the motor wasn’t holding, stepping, buzzing or anything.
#Grbl controller for k40 drivers#
Of course I thought I had stepper drivers around, but didn’t so I went back to LO and bought the M415 driver. A week or so later I got an email from them saying there might be a cable missing, I wasn’t sure it was meant to come with one but either way, they sent it out and got it a few days later, so good service there. First thing I noticed no instructions, but simple enough. Of course first time I saw it, I didn’t pick It up and it was out of stock the next day, so a few months later I saw them back again and ordered one, arrived a few days later. I Picked up a motorised Z table from light objects for my Chinese cheapo laser cutter, it’d make it a lot more useful. my lasers gantry is about 93mm to clear, ztable is 105mm.
![grbl controller for k40 grbl controller for k40](https://hackaday.com/wp-content/uploads/2017/06/k40-replacement-controller-wide.jpg)
Editors Note: This ztable doesn’t actually fit in my particular Chinese laser, it is too tall… I’m seeing if they have shorter threaded rods available.